What you looking for is the ZyAIR G-4100 (I think there is a newer version) - This works like a dream, no fancy stuff needed,
Just a LAN connection from your router and it does everything! Not baddly priced at about R3500.00

You can contact Duxbury networking (distributor) and they can advise a reseller for you.
Tell: 087 943 9076

1. Free access for users, this would be limited to 50mb
2. Paid access for those users who require longer access or more downloading.

Dear Ryan,

If you like to keep all profit from the customers, with combined free and paid access, and tons of other features, please take a look at www.antamedia.com/hotspot

Antamedia HotSpot is a leading Windows-based platform and provides much better control - not available in similar third-party hosted systems. You will need a PC, but ROI is faster as you'll have all profit for yourself.